Hi! I have an account in a mining website. Are these websites legit? If yes, how they're doing this mining? If no, why you say so? Explain please.
We can't answer your question if you wont tell name of that website. 
There are only few cloud mining websites which are legit more or less - Genesis Mining and Hashflare. They just have mining hardware and they are selling hashpower to their users. But it's not very profitable for users.
One example is Startminer.com... You can search for it. I'm thinking that too.
Oh, that's obvious scam. They have nothing with cloud mining, don't be naive. Just stay away!